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Doppler physics

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https://www.readbyqxmd.com/read/28636515/a-brief-period-of-intensive-cardiac-rehabilitation-improves-global-longitudinal-strain-and-diastolic-function-after-a-first-uncomplicated-myocardial-infarction
#1
Gabriella Malfatto, Miriam Revera, Giovanna Branzi, Francesca Ciambellotti, Alessia Giglio, Simonetta Blengino, Matteo Oldani, Camilla Facchini, Gianfranco Parati, Mario Facchini
Objectives In patients with abnormal left ventricular ejection fraction (LVEF) after acute myocardial infarction (AMI), cardiac rehabilitation with physical training prevents cardiac remodelling. To define the role of rehabilitation in the recovery of ventricular function in less severe cases, we studied its effects on more refined indexes of left ventricular function in uncomplicated, low-risk patients. Methods and results Fifty-five patients underwent percutaneous coronary revascularization after uncomplicated first AMI...
March 21, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28599229/round-ligament-varicosities-diagnosed-as-inguinal-hernia-during-pregnancy-a-case-report-and-series-from-two-regional-hospitals-in-japan
#2
Yuka Mine, Susumu Eguchi, Akihito Enjouji, Masayoshi Fukuda, Junzo Yamaguchi, Yusuke Inoue, Fumihiko Fujita, Ohzora Tsukamoto, Hideaki Masuzaki
INTRODUCTION: Round ligament varicosities (RLV) are not well-known and they are usually caused by pregnancy. Although the groin swelling of RLV mimics an inguinal hernia, it is difficult to distinguish between them through clinical examination alone, and there have been few published reports on this topic, especially from Asia. CASE PRESENTATION: A 37-year-old Japanese woman complained of left groin swelling for 2 weeks at her 28th week of gestation of her first pregnancy...
2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28598874/transverse-split-sternotomy-a-mini-invasive-approach-for-repair-of-congenital-cardiac-defects
#3
Pankaj Garg, Arvind Kumar Bishnoi, Kartik Patel, Chandrashekaran Annanthnarayan, Jigar Patel, Malkesh Talsariya, Komal Shah, Sanjay Patel
OBJECTIVE: In this article, we aim to review our mini-invasive technique of transverse sternal split (TSS) with or without cervical cannulation for cardiopulmonary bypass (CPB), its usefulness, and efficiency for repair of congenital cardiac defects. METHODS: Between January 2013 and June 2015, 34 infants and small children were operated through TSS in third or fourth intercostal space [Tetralogy of Fallot 11, perventricular ventricular septal defect (VSD) device closure 23]...
June 8, 2017: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/28598374/doppler-navigation-system-with-a-non-stabilized-antenna-as-a-sea-surface-wind-sensor
#4
Alexey Nekrasov, Alena Khachaturian, Vladimir Veremyev, Mikhail Bogachev
We propose a concept of the utilization of an aircraft Doppler Navigation System (DNS) as a sea-surface wind sensor complementary to its normal functionality. The DNS with an antenna, which is non-stabilized physically to the local horizontal with x-configured beams, is considered. We consider the wind measurements by the DNS configured in the multi-beam scatterometer mode for a rectilinear flight scenario. The system feasibility and the efficiency of the proposed wind algorithm retrieval are supported by computer simulations...
June 9, 2017: Sensors
https://www.readbyqxmd.com/read/28582335/a-prospective-clinical-trial-comparing-visible-light-spectroscopy-to-handheld-doppler-for-postoperative-free-tissue-transfer-monitoring
#5
Alexander F Mericli, James Wren, Patrick B Garvey, Jun Liu, Charles E Butler, Jesse C Selber
BACKGROUND: Early detection of compromised free flap perfusion is critical. A common modality of thrombosis detection, physical exam augmented with hand-held Doppler, only provides intermittent data and is insensitive to venous compromise. Visible light spectroscopy (VLS) provides continuous, non-invasive evaluation of tissue perfusion. We hypothesized that VLS is a more sensitive and specific monitoring method for early detection of post-operative flap compromise than intermittent, hand-held Doppler and clinical exam...
June 1, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28581366/flat-head-positioning-increases-cerebral-blood-flow-in-anterior-circulation-acute-ischemic-stroke-a-cluster-randomized-phase-iib-trial
#6
Verónica V Olavarría, Pablo M Lavados, Paula Muñoz-Venturelli, Francisca González, Javier Gaete, Sheila Martins, Hisatomi Arima, Craig S Anderson, Alejandro M Brunser
Background Whether lying-flat improves blood flow in patients with acute ischemic stroke is unknown. Our aim was to investigate if lying-flat "changes" cerebral blood flow velocities assessed by transcranial Doppler in acute ischemic stroke patients. Methods In a multicenter cluster clinical trial, we randomly assigned patients within 12 h from onset of a neurological deficit due to cerebral ischemia of the anterior circulation to lying-flat or upright head positioning. The primary outcome was a change of 8 cm/s or more in mean cerebral blood flow velocities on transcranial Doppler to the middle cerebral artery at 1 and 24 h post-randomization, adjusted for imbalance in baseline variables...
January 1, 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/28571941/clinical-predictors-of-isolated-tubal-torsion-a-case-series
#7
K W Webster, S M Scott, P S Huguelet
STUDY OBJECTIVE: A rare cause of adolescent abdominal pain includes isolated tubal torsion (ITT). Presentation is nonspecific and few studies have investigated adolescents. Our study objective is to describe the presentation and management of ITT in a large case series. DESIGN: Retrospective observational case series. SETTING: Tertiary care children's hospital. PARTICIPANTS: Females aged 3-21, presenting to Children's Hospital Colorado and diagnosed with ITT between January 2004 and August 2015...
May 29, 2017: Journal of Pediatric and Adolescent Gynecology
https://www.readbyqxmd.com/read/28570718/free-flap-reconstruction-monitoring-techniques-and-frequency-in-the-era-of-restricted-resident-work-hours
#8
Urjeet A Patel, David Hernandez, Yelizaveta Shnayder, Mark K Wax, Matthew M Hanasono, Joshua Hornig, Tamer A Ghanem, Matthew Old, Ryan S Jackson, Levi G Ledgerwood, Patrik Pipkorn, Lawrence Lin, Adrian Ong, Joshua B Greene, James Bekeny, Yin Yiu, Salem Noureldine, David X Li, Joel Fontanarosa, Evan Greenbaum, Jeremy M Richmon
Importance: Free flap reconstruction of the head and neck is routinely performed with success rates around 94% to 99% at most institutions. Despite experience and meticulous technique, there is a small but recognized risk of partial or total flap loss in the postoperative setting. Historically, most microvascular surgeons involve resident house staff in flap monitoring protocols, and programs relied heavily on in-house resident physicians to assure timely intervention for compromised flaps...
June 1, 2017: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/28557070/color-and-power-doppler-sonography-for-pneumothorax-detection
#9
John R Richards, Julianne M Awrey, Sarah E Medeiros, John P McGahan
The use of B- and M-mode sonography for detection of pneumothorax has been well described and studied. It is now widely incorporated by sonographers, emergency physicians, trauma surgeons, radiologists, and critical care specialists worldwide. Lung sonography can be performed rapidly at the bedside or in the prehospital setting. It is more sensitive, specific, and accurate than plain chest radiography. The use of color and power Doppler sonography as an adjunct to B- and M-mode imaging for detection of pneumothorax has been described in a small number of studies and case reports but is much less widely known or used...
May 30, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28547739/determination-of-spermatic-vein-reflux-after-varicocele-repair-helps-to-define-the-efficacy-of-treatment-in-improving-sperm-parameters-of-subfertile-men
#10
S D'Andrea, A Micillo, A Barbonetti, A V Giordano, S Carducci, A Mancini, S Necozione, F Francavilla, S Francavilla
PURPOSE: A continuous spermatic venous reflux (SVR) at colour Doppler ultrasound (CDU) is an evidence for varicocele, a frequent correlate for male subfertility. We explored whether SVR after left varicocele repair is predictive for changes in semen quality in subfertile men. METHODS: Blood hormones (FSH, LH, and total testosterone) and scrotal CDU were obtained in subfertile patients with left grade II or grade III varicocele on physical evaluation and a poor sperm quality...
May 25, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28537347/adnexal-torsion-in-the-first-trimester-of-pregnancy-diagnosis-laparoscopic-management-and-review-of-the-literature
#11
Rafael Bras, Jorge Braga, António Tomé, Helder Ferreira
We report a case of an adnexal torsion in a 27-year-old woman in her 12th week of gestation. She presented with hypogastric and lumbar pain with biliary vomiting and nausea. Upon physical examination, tenderness in the right lower quadrant with rebound tenderness was apparent, and gynecological examination revealed right adnexal tenderness with absence of abnormal cervical discharge. The transvaginal ultrasonography demonstrated an enlarged cystic right ovary with no flow detected on color and power Doppler mode...
May 24, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/28530770/diagnostic-value-of-appendicular-doppler-ultrasonography-in-acute-appendicitis
#12
Hüseyin Uzunosmanoğlu, Yunsur Çevik, Şeref Kerem Çorbacıoğlu, Emine Akıncı, Hakan Buluş, Kadir Ağladıoğlu
BACKGROUND: Acute appendicitis is one of the most common causes of acute abdominal pain prompting emergency department (ED) visits. It is critical for the physicians to promptly and accurately diagnose acute appendicitis. The present study aimed to evaluate the diagnostic efficacy of Doppler ultrasonography (USG) in patients with acute appendicitis and compare this new method with other commonly used radio-diagnostic tools. METHODS: All patients who were diagnosed with acute appendicitis at the Kecioren Training and Research Hospital ED and later underwent appendectomy between October 2012 and April 2013 were included in the study...
May 2017: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/28515592/inguinoscrotal-hernia-in-infants-three-case-reports-in-ultrasound-diagnosis
#13
Dharmraj Meena, Richa Jhuria, Sangeeta Saxena, Umesh Saini
An inguinal hernia occurs when an intestinal loop or part of the omentum or genital organs passes into the scrotal cavity or labia through an incompletely obliterated processus vaginalis. Inguinal hernias are most common in preterm neonates, especially at 32-weeks gestation. Content of hernia is mostly bowel and ovary/testicles. Presence of uterus in herniated sac is rare, and only few cases are reported in literature. Hernia is more frequently located on the right side because the right processus vaginalis closes later than the left...
January 2017: Indian Journal of Radiology & Imaging
https://www.readbyqxmd.com/read/28511233/-diagnostic-imaging-in-cases-of-acute-scrotum
#14
Natalie Ring, Gundula Staatz
Acute scrotum is one of the most common urologic emergencies in children and adolescents. This condition involves acute testicular pain, which is often accompanied by scrotal swelling and erythema. It is most important to distinguish between cases that require immediate surgery and those that can be treated conservatively. As patient history and physical findings may not always be unequivocal, ultrasound with Colour-Coded Doppler Sonography is the imaging modality of choice for further evaluation. Testicular torsion and other differential diagnoses such as epididymitis, appendiceal torsion, intratesticular haematoma after trauma, or complicated inguinal hernia have to be considered...
May 16, 2017: Aktuelle Urologie
https://www.readbyqxmd.com/read/28493799/shear-wave-elastography-basic-physics-and-musculoskeletal-applications
#15
Mihra S Taljanovic, Lana H Gimber, Giles W Becker, L Daniel Latt, Andrea S Klauser, David M Melville, Liang Gao, Russell S Witte
In the past 2 decades, sonoelastography has been progressively used as a tool to help evaluate soft-tissue elasticity and add to information obtained with conventional gray-scale and Doppler ultrasonographic techniques. Recently introduced on clinical scanners, shear-wave elastography (SWE) is considered to be more objective, quantitative, and reproducible than compression sonoelastography with increasing applications to the musculoskeletal system. SWE uses an acoustic radiation force pulse sequence to generate shear waves, which propagate perpendicular to the ultrasound beam, causing transient displacements...
May 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28467568/-leriche-syndrome
#16
Serdar Demirgan, Abdullah Tolga Şitilci, Sezen Solak, Mehmet Salih Sevdi, Kerem Erkalp, Emin Köse
Leriche syndrome is a disease characterized by thrombotic occlusion in the aorta, frequently in the distal renal artery. Classic symptoms of this syndrome include pain in the lower extremities emerging during activity (claudication), impalpability of femoral pulses, and impotency in male patients. Definitive diagnosis of claudication due to insufficient circulation as well as claudication that is neurogenic in origin, is difficult. Medical history, physical examination, and monitoring methods are important for definitive diagnosis...
January 2017: Aǧrı: Ağrı (Algoloji) Derneği'nin Yayın Organıdır, the Journal of the Turkish Society of Algology
https://www.readbyqxmd.com/read/28460711/application-of-shortwave-diathermy-to-lower-limb-increases-arterial-blood-flow-velocity-and-skin-temperature-in-women-a-randomized-controlled-trial
#17
Natanael Teixeira Alves De Sousa, Elaine Caldeira De Oliveira Guirro, João Guilherme Calió, Mariane Cristina De Queluz, Rinaldo Roberto De Jesus Guirro
BACKGROUND: Shortwave diathermy (SWD) and microwave diathermy (MWD) are frequently used by physical therapists to treat musculoskeletal conditions. The therapeutic benefits are usually associated with an increase in tissue temperature; however, there is no consensus on the changes in blood flow. OBJECTIVES: 1) To evaluate the behavior of temperature and arterial blood flow after the application of SWD and MWD to the lower limb of healthy women aged 18-30 and 2) to assess whether changes in limb positioning can influence SWD response...
March 2017: Brazilian Journal of Physical Therapy
https://www.readbyqxmd.com/read/28457379/electrospun-phea-pla-pcl-scaffold-for-vascular-regeneration-a-preliminary-in%C3%A2-vivo-evaluation
#18
S Buscemi, V D Palumbo, A Maffongelli, S Fazzotta, F S Palumbo, M Licciardi, C Fiorica, R Puleio, G Cassata, L Fiorello, G Buscemi, A I Lo Monte
BACKGROUND: There is increasing interest in the development of vessel substitutes, and many studies are currently focusing on the development of biodegradable scaffolds capable of fostering vascular regeneration. We tested a new biocompatible and biodegradable material with mechanical properties similar to those of blood vessels. METHODS: The material used comprises a mixture of α,β-poly(N-2-hydroxyethyl)-d,l-aspartamide (PHEA) and polylactic acid (PLA), combined with polycaprolactone (PCL) by means of electrospinning technique...
May 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28426903/the-therapeutic-efficacy-of-botulinum-toxin-in-treating-scleroderma-associated-raynaud-s-phenomenon-a-randomized-double-blind-placebo-controlled-clinical-trial-assessing
#19
Ricardo J Bello, Carisa M Cooney, Eitan Melamed, Keith Follmar, Gayane Yenokyan, Gwendolyn Leatherman, Ami A Shah, Fredrick M Wigley, Laura K Hummers, Scott D Lifchez
Objective To assess the therapeutic efficacy of local injections with Botulinum Toxin Type-A (Btx-A) in improving blood flow to the hands of patients with Raynaud's Phenomenon (RP) secondary to scleroderma. Methods In this randomized, double-blind, placebo-controlled clinical trial (http://ClinicalTrials.gov #NCT02165111), patients with scleroderma-associated RP received Btx-A (50 units in 2.5 mL) in one randomly selected hand and sterile saline (2.5 mL) in the opposite hand. Follow-up at 1 and 4 months post-injection included Laser Doppler Imaging (LDI) of hands, patient-reported outcomes, and physical exam...
April 20, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28425258/assessment-of-developmental-and-radiological-long-term-outcomeof-children-with-surgically-treated-midgut-volvulus
#20
Ahmet Murat Çakmak, Özlem Boybeyi Türer, Gülnur Göllü Bahadir, Bilge Türedi, Ufuk Ateş, Adalet Elçin Yildiz, Gönül Küçük, Ömer Suat Fitöz, Betül Ulukol, Mustafa Kemal Aslan, Tutku Soyer, Hüseyin Dindar
BACKGROUND/AIM: The aim is to evaluate the long-term outcome of asymptomatic patients who underwent surgical correction for midgut volvulus. MATERIALS AND METHODS: Seven patients managed surgically for midgut volvulus in the last 3 years were included. Demographic features, symptoms at presentation, diagnoses, surgical procedures, and complications were recorded. Patients were then contacted for follow-up and evaluation of long-term outcomes. General physical conditions, anthropometric parameters, feeding habits, and defecation histories were evaluated...
April 18, 2017: Turkish Journal of Medical Sciences
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